LEED Recycled Content Value Calculator

SettingsSettings for this calculationUS

Market

Imperial · sales tax

Cost of this material

Delivered cost of the material line.

Material cost, excluding labour and installation. Where an invoice bundles them, the default convention is to take 45% of the total as material.

Post-consumer content (%)

Material recovered from end users.

Waste generated by households or commercial users that has finished its intended use — a drink can, a demolished building's steel. It counts at full weight because diverting it is a genuine recovery.

Pre-consumer content (%)

Manufacturing scrap diverted from waste.

Diverted from the waste stream during manufacture — but explicitly NOT reworked scrap that a process would routinely reuse anyway. It counts at half weight, because much of it would never have been waste.

Total project materials cost

The denominator for the credit.

The whole project's materials cost, excluding mechanical, electrical and plumbing. Getting the denominator wrong is the most common error in these submissions, and it moves the answer more than any individual material does.

Recycled content value

$17,500

Medium confidence

Implements the standard weighting convention. Credit thresholds, documentation requirements and the exact scope of the denominator vary between rating system versions — work from the version your project is registered under.

Weighted recycled fraction: 35 %
Share of total materials cost: 2.19 %
Post-consumer contribution: $12,500
Pre-consumer contribution at half weight: $5,000
Total materials cost: $800,000

Then change the inputs to see how far the answer moves.

Show calculation logic

How this was calculated

Formula source(s)

Recycled content value = (post-consumer fraction + ½ pre-consumer fraction) × material cost — the ISO 14021 based convention used in LEED materials credits
Mechanical, electrical and plumbing components are excluded from the materials cost denominator in LEED calculations

Inputs used

Cost of this material: 50000
Post-consumer content (%): 25
Pre-consumer content (%): 20
Total project materials cost: 800000

Intermediate steps

Weighted recycled fraction: 35 %
Share of total materials cost: 2.19 %
Post-consumer contribution: $12,500
Pre-consumer contribution at half weight: $5,000
Total materials cost: $800,000

Final result$17,500

Confidence note: Implements the standard weighting convention. Credit thresholds, documentation requirements and the exact scope of the denominator vary between rating system versions — work from the version your project is registered under.

What this calculation does not cover

This computes one material's contribution. A submission sums every material line, and the denominator must be consistent across all of them.
Content percentages must come from the manufacturer's declaration, not from an assumption about what a material is usually made of.
Rating system versions differ in scope, thresholds and permitted defaults. Confirm against the version your project is registered under rather than a general description.

Computed in your browser — nothing you enter is uploaded. Presented in US customary units and US trade terminology. Where a formula follows a published standard, that standard and its edition are cited beside it on this page; where none governs, the page says so. Local amendments override model codes — verify against the code in force where you build.

Sources checked 2026-08-27 · in the site-wide review of 2026-09-06 · v1.0.0

Regulatory standards & verification citations2

Recycled content value = (post-consumer fraction + ½ pre-consumer fraction) × material cost — the ISO 14021 based convention used in LEED materials credits
Mechanical, electrical and plumbing components are excluded from the materials cost denominator in LEED calculations

Which documents these citations point at

Standards referenced: ISO 14021 (International Organization for Standardization, International).

Cite this page

Your workspace

Most jobs need more than one number. Add the calculators you need next and they open right here, underneath this one — your figures stay on screen and nothing is lost to a page change.

Now that you have the number

These guides cover the work this quantity is for — the first ones run this calculator inside the section that raises the question.

Reporting Operational Carbon and Recycled Contentuses this calculator

One box wants last year's electricity as tonnes of CO2e, the next wants recycled content as a share of materials spend. Different evidence, different rules.

How to calculate LEED recycled content value in 5 steps

Cost of this materialDelivered cost of the material line.

Post-consumer content (%)Material recovered from end users.

Pre-consumer content (%)Manufacturing scrap diverted from waste.

Total project materials costThe denominator for the credit.

Recycled content valueThe tool computes the recycled content value from those figures and shows the formula, its sources, and a confidence rating alongside it.

Cost of this material	Recycled content value (currency)
5,000	1,750
10,000	3,500
20,000	7,000
50,000	17,500
100,000	35,000
200,000	70,000
500,000	175,000

Cost of this material

Recycled content value (currency)

5,000

1,750

10,000

3,500

20,000

7,000

50,000

17,500

100,000

35,000

200,000

70,000

500,000

175,000

Frequently asked questions

Why does pre-consumer content only count for half?

Because much of it was never really going to be waste. Manufacturing offcuts that a plant would feed back into its own process anyway represent no diversion at all, and the convention discounts the category to reflect that. Post-consumer material has genuinely finished a life with an end user and been recovered, so it counts at full weight.

What counts as the total materials cost?

The project's materials, excluding mechanical, electrical and plumbing components — and it must be the same basis for every line you submit. This denominator is where most submissions go wrong: quietly shrinking it inflates every percentage above it, and an inconsistent basis between lines is the first thing a reviewer notices.

Do I use the invoice total if labour is bundled in?

No — you need the material portion alone. Where an invoice does not separate them, the usual default is to take 45% of the total as material cost. If your supplier can break it out properly, that is better evidence than a default, and it is worth asking for at order rather than at submission.